Abstract
We investigate cross sections for neutrino- exclusive scattering and for muon capture on using wave functions obtained in the ab initio no-core shell model. In our parameter-free calculations with basis spaces up to the we show that realistic nucleon-nucleon interactions, like, e.g., the CD-Bonn, underpredict the experimental cross sections by more than a factor of 2. By including a realistic three-body interaction, Tucson-Melbourne , the cross sections are enhanced significantly and a much better agreement with experiment is achieved. At the same time, the interaction improves the calculated level ordering in . The comparison between the CD-Bonn and the three-body calculations provides strong confirmation for the need to include a realistic three-body interaction to account for the spin-orbit strength in -shell nuclei.
- Received 27 March 2003
DOI:https://doi.org/10.1103/PhysRevLett.91.012502
©2003 American Physical Society